Re: Caveat emptor: Beware of ZFS on HEAD
Thumbs up, gentlemen! Regards, Edwin -- Deze e-mail en de inhoud is vertrouwelijk en uitsluitend bestemd voor de geadresseerde(n). Indien u niet de geadresseerde bent van deze e-mail verzoeken wij u dit direct door te geven aan de verzender door middel van een reply e-mail en de ontvangen e-mail uit uw systemen te verwijderen. Als u geen geadresseerde bent, is het niet toegestaan om kennis te nemen van de inhoud, deze te kopieren, te verspreiden, bekend te maken aan derden noch anderszins te gebruiken. The information contained in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Please notify us immediately if you have received it in error by reply e-mail and then delete this message from your system. On Mon, Jul 17, 2017 at 8:35 AM, Andriy Gapon wrote: > On 12/07/2017 23:20, Peter Wemm wrote: > > We mostly run HEAD in the freebsd.org cluster. Sometime in the last > few weeks > > an ugly zfs problem has surfaced. If a redundant volume is degraded, zfs > > panics on boot. If a drive fails while running, or is manually put > offline, zfs > > panics the same way. > > > > I do not have a smoking gun, but I am suspicious of the June 28th commits > > (starting at r320156) and their follow-ups. eg: r320452. > > > > https://bugs.freebsd.org/220691 > > > > I believe single disk systems will *not* be affected by this - the panic > only > > happens when a raidz (and presumably mirror) degrades. Your laptop etc > should > > be fine. > > > > I apologize for being vague - I do not know more. Folks running HEAD > should > > take appropritate precautions (eg: keeping a known-good kernel.old and > modules > > around). This is always advisable when running HEAD anyway, > particularly so > > now. For us, a kernel.old from June 18th worked fine. > > > > My apologies for the bug. > Everyone affected, could you please test the patch from the bug report? > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220691#c3 > Thank you! > > -- > Andriy Gapon > ___ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" > ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: Caveat emptor: Beware of ZFS on HEAD
On 12/07/2017 23:20, Peter Wemm wrote: > We mostly run HEAD in the freebsd.org cluster. Sometime in the last few > weeks > an ugly zfs problem has surfaced. If a redundant volume is degraded, zfs > panics on boot. If a drive fails while running, or is manually put offline, > zfs > panics the same way. > > I do not have a smoking gun, but I am suspicious of the June 28th commits > (starting at r320156) and their follow-ups. eg: r320452. > > https://bugs.freebsd.org/220691 > > I believe single disk systems will *not* be affected by this - the panic only > happens when a raidz (and presumably mirror) degrades. Your laptop etc > should > be fine. > > I apologize for being vague - I do not know more. Folks running HEAD should > take appropritate precautions (eg: keeping a known-good kernel.old and > modules > around). This is always advisable when running HEAD anyway, particularly so > now. For us, a kernel.old from June 18th worked fine. > My apologies for the bug. Everyone affected, could you please test the patch from the bug report? https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220691#c3 Thank you! -- Andriy Gapon ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Caveat emptor: Beware of ZFS on HEAD
We mostly run HEAD in the freebsd.org cluster. Sometime in the last few weeks an ugly zfs problem has surfaced. If a redundant volume is degraded, zfs panics on boot. If a drive fails while running, or is manually put offline, zfs panics the same way. I do not have a smoking gun, but I am suspicious of the June 28th commits (starting at r320156) and their follow-ups. eg: r320452. https://bugs.freebsd.org/220691 I believe single disk systems will *not* be affected by this - the panic only happens when a raidz (and presumably mirror) degrades. Your laptop etc should be fine. I apologize for being vague - I do not know more. Folks running HEAD should take appropritate precautions (eg: keeping a known-good kernel.old and modules around). This is always advisable when running HEAD anyway, particularly so now. For us, a kernel.old from June 18th worked fine. -- Peter Wemm - pe...@wemm.org; pe...@freebsd.org; pe...@yahoo-inc.com; KI6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246 signature.asc Description: This is a digitally signed message part.
Beware, ZFS on head!
Depending on how you build it, you may either get a kernel compile failure (if you build zfs into the core kernel with "options ZFS"), or possibly even an invalid zfs.ko with an undefined symbol that can't be used at reboot time. Be exceptionally careful. I suggest, before rebooting, do a # nm /boot/kernel/zfs.ko | grep atomic_dec If you see: U atomic_dec_64_nv .. you will have a sub-optimal reboot experience and you may want to save your kernel.old. (no output => you're fine => carry on!) -- Peter Wemm - pe...@wemm.org; pe...@freebsd.org; pe...@yahoo-inc.com; KI6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246 signature.asc Description: This is a digitally signed message part.
Re: ZFS on HEAD
On 2012-09-28 21:49, Matthew D. Fuller wrote: > On Fri, Sep 28, 2012 at 09:44:08PM +0200 I heard the voice of > Sami Halabi, and lo! it spake thus: >> >> what count for little, and what count for huge. > > Off the top of my head, I'd say less than 1 gig (maybe 2) or more than > 256. With very little, you may need to start looking at some of the > i386 tuning to things to scale back. But anywhere in the middle the > defaults should work fine (I'm sure there are gains to be had from > working at tuning, but probably not huge and probably very dependent > on your particular hardware and workloads). > > Just as a measuring point, I managed to run ZFS on an moderately busy FTP server with 2GB while waiting for replacement RAM. It worked, but is perhaps not the best approach. Less than 4 or even 8GB ram is probably not recommended these days, especially since RAM is resonably cheap. Regards! -- Niclas P.S. The handbook should perhaps be slightly updated wrt ZFS, at least to clarify that tuning is only needed on i386 in the general case, and that you're usually better off running ZFS on an amd64 machine if you can choose. I'll look into it tomorrow... ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
On Fri, Sep 28, 2012 at 09:44:08PM +0200 I heard the voice of Sami Halabi, and lo! it spake thus: > > what count for little, and what count for huge. Off the top of my head, I'd say less than 1 gig (maybe 2) or more than 256. With very little, you may need to start looking at some of the i386 tuning to things to scale back. But anywhere in the middle the defaults should work fine (I'm sure there are gains to be had from working at tuning, but probably not huge and probably very dependent on your particular hardware and workloads). -- Matthew Fuller (MF4839) | fulle...@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream. ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
on 28/09/2012 22:37 Sami Halabi said the following: > got it, I thought amd64 is i386 with 64 bit, seems i was wrong in termenlogy Yes, we refer to the general platform as x86. i386 is 32-bit x86 and amd64 is 64-bit x86. -- Andriy Gapon ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
Hi, what count for little, and what count for huge. is there any documented tunings needed for both cases? if not I'd appreciate it much if you explain the tunungs needed and what they do. Sami On Fri, Sep 28, 2012 at 9:37 PM, Matthew D. Fuller wrote: > On Fri, Sep 28, 2012 at 09:31:41PM +0200 I heard the voice of > Sami Halabi, and lo! it spake thus: > > /usr/src/sys/amd64/confSAMI: unknown option KVA_PAGES > > You're using amd64, not i386; you don't need to mess with KVA_PAGES. > > In fact, you probably don't need to tune anything on amd64, unless > you've got either very little or very huge physical memory. > > > -- > Matthew Fuller (MF4839) | fulle...@over-yonder.net > Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ >On the Internet, nobody can hear you scream. > -- Sami Halabi Information Systems Engineer NMS Projects Expert FreeBSD SysAdmin Expert ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
On Fri, Sep 28, 2012 at 09:31:41PM +0200 I heard the voice of Sami Halabi, and lo! it spake thus: > /usr/src/sys/amd64/confSAMI: unknown option KVA_PAGES You're using amd64, not i386; you don't need to mess with KVA_PAGES. In fact, you probably don't need to tune anything on amd64, unless you've got either very little or very huge physical memory. -- Matthew Fuller (MF4839) | fulle...@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream. ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
got it, I thought amd64 is i386 with 64 bit, seems i was wrong in termenlogy Thanks a lot On Fri, Sep 28, 2012 at 9:36 PM, Glen Barber wrote: > On Fri, Sep 28, 2012 at 09:31:41PM +0200, Sami Halabi wrote: > > On Fri, Sep 28, 2012 at 6:33 PM, Glen Barber wrote: > > > On Fri, Sep 28, 2012 at 06:08:41PM +0200, Sami Halabi wrote: > > > > I tried to follow: > > > > > > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html > > > > > > > > to recompile the kernel with KVA_PAGES > > > > and i couldn't compile. > > > > > > > > any ideas why this? > > > > > > > > > > What was the error? > > > > > > > /usr/src/sys/amd64/confSAMI: unknown option KVA_PAGES > > > > KVA_PAGES is not a valid option for amd64 kernel configurations. > > It is only needed/recommended for i386 and pc98 architectures. > > Glen > > -- Sami Halabi Information Systems Engineer NMS Projects Expert FreeBSD SysAdmin Expert ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
On Fri, Sep 28, 2012 at 09:31:41PM +0200, Sami Halabi wrote: > On Fri, Sep 28, 2012 at 6:33 PM, Glen Barber wrote: > > On Fri, Sep 28, 2012 at 06:08:41PM +0200, Sami Halabi wrote: > > > I tried to follow: > > > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html > > > > > > to recompile the kernel with KVA_PAGES > > > and i couldn't compile. > > > > > > any ideas why this? > > > > > > > What was the error? > > > > /usr/src/sys/amd64/confSAMI: unknown option KVA_PAGES > KVA_PAGES is not a valid option for amd64 kernel configurations. It is only needed/recommended for i386 and pc98 architectures. Glen pgpHbbrIEcKJU.pgp Description: PGP signature
Re: ZFS on HEAD
/usr/src/sys/amd64/confSAMI: unknown option KVA_PAGES On Fri, Sep 28, 2012 at 6:33 PM, Glen Barber wrote: > On Fri, Sep 28, 2012 at 06:08:41PM +0200, Sami Halabi wrote: > > I tried to follow: > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html > > > > to recompile the kernel with KVA_PAGES > > and i couldn't compile. > > > > any ideas why this? > > > > What was the error? > > Glen > > -- Sami Halabi Information Systems Engineer NMS Projects Expert FreeBSD SysAdmin Expert ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS on HEAD
On Fri, Sep 28, 2012 at 06:08:41PM +0200, Sami Halabi wrote: > I tried to follow: > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html > > to recompile the kernel with KVA_PAGES > and i couldn't compile. > > any ideas why this? > What was the error? Glen pgpSAFywn5RwW.pgp Description: PGP signature